Super Absorbent Polymer (SAP) consists of small gellike beads that have all the water removed. When water is reintroduced, the crystals absorb the water and grow into a gel. SAP is an essential component in baby diapers, feminine hygiene products as well as incontinence products. Personal hygiene products which involve SAP are a steadily growing market, since it allows the products to be much thinner and more effective in trapping moisture.

The production of these personal hygiene products is a continuous process and one of the most critical tasks is the accurate, uniform and even distribution of SAP onto the fast-moving band of cellulose or bicomponent fiber. The short term accuracy and uniformity of the SAP-feeding device are key to the quality of the end product. Traditionally diaper manufacturers use gravimetric single or twin screw feeders.

Areas of application include:

Baby diapers

Feminine hygiene products

Incontinence products

Key Benefits

High performance SFT digital weighing technology, which gives outstanding results in short term accuracy

SmartConnex control system ensures long term stability and consistent feeding quality.

Application Examples

The production of these personal hygiene products is a continuous process and one of the most critical tasks is the accurate, uniform and even distribution of SAP onto the fast-moving band of cellulose or bicomponent fiber. The short term accuracy and uniformity of the SAP-feeding device are key to the quality of the end product. Traditionally diaper manufacturers use gravimetric single or twin screw feeders, however the Coperion K-Tron BSP feeders have proven to be ideal for this application.

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Product Range

Feeding Equipment

Traditionally, typical feeders for such an application would include K2-ML-T35 twin screw or K2-ML-S60 single screw feeders. In some cases K-ML-KV2 vibratory feeders with 60 or 120 mm trays have also been used. The revolutionary Bulk Solids Pump (BSP) with its outstanding feeding performance, is a real alternative for this application. Test results as well as positive experience at customer sites have clearly shown that the BSP is the ideal feeder for SAP thanks to the uniform, pulse-free flow of material.

Material Handling

The level of short term accuracy required for this application can only be achieved when the refill systems are optimally configured to suit the feeding systems. Coperion K‑Tron’s vacuum conveying systems offer a wide range of solutions for this purpose. In addition, the SAP has to maintain its original form to work optimally, therefore it’s very important not to break up the SAP particles during conveying. As a result we optimize our systems to use low velocity or dense phase conveying techniques.